MMPs are ___ dependent.
a. Zinc
b. Phosphorous
C. Calcium
d. Iron
Ans: C. Calcium
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Enzymes function by
(a) being consumed (used up) in the reaction. (b) lowering the activation energy of a reaction. (c) combining with otherwise toxic substances in the cell. (d) adding heat to the cell to speed up the reaction
The plant movement in the above figure is
caused by a. auxin differences in two sides of the coleoptile. b. gibberellin released in one side of the leaf. c. abscisic acid in two sides of the stems. d. salicylic acid in two sides of the roots. e. none of these.
The main point of entry of water into the blood of freshwater fishes is through:a
the skin. b. the gills. c. the mouth. d. the anus. e. the eyes
Pseudocoelomate nematodes lack a body cavity.
A. Correct, they are solid from the gut to the cuticle. B. Incorrect, their body cavity is fully enclosed by ectoderm but is a functional body cavity. C. Incorrect, although not fully enclosed by mesoderm, the pseudocoel is a body cavity. D. Correct, their pseudocoel does not allow for the development and expansion of organs.